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Prev Professional Automotive Repair Technical Discussions for February 5, 2010
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Open Help Requests for GM
Help Request Answers
1992 Chevrolet Corvette 5.7L theft system VIN: 1G1YY33P6N
this vehicle was towed in from a tow yard that explained to us that the vehicle was up for sale in front of his business meanwhile people were test driving vehicle. the last person to drive vehicle left it in 1st gear and when owner went out to start vehicle u...
1995 Chevrolet K1500 Silverado 5.7L temp gauge VIN: 1GCGK29K5S
Hello all: I've put my thinking cap on but drawn a blank. The temp gauge on this truck goes up and down in a regular fashion every minute or so. I initially replaced the thermostat to no avail and then replaced a leaky water pump and put a Delco thermostat in ...
1997 Chevrolet Astro 4.3L No Start VIN: 1GNDM19W9V
This Astro won't run. It originally came in for some body work and the customer left it running when he dropped it off. It has only started a couple times and it was always hard to start. Now it won't start at all. It has 64psi of fuel pressure, good strong sp...
2000 Chevrolet Malibu 3.1L Poor Idle Quality, Cuts out, Stall VIN: 1G1NE52J7Y
Hello, i have a malibu that wont stay running. Originally this car came in overheating with a blown headgasket, both heads and gaskets were replaced as well as intake gaskets. Started the car and ran it until the thermostat came open and the fans came on, abou...
2004 Chevrolet SSR 5.3L roof VIN: 1GCES14P44
Please Help!! I have a SSR with a retractable roof malfunction. I will try to describe the malfuntion as best as I can. When you operate the roof down, the windows will come down, the tonnaeu will unlatch and raise up and then nothing will happen.I get an erro...
2005 Chevrolet Venture LS 3.4L rf speed sensor VIN: 1GNDV03E95
Hey gm techs I need your help. I have an 05 venture van with code c1226 speed sensor erratic rf. when driven over speed bumps the speed sensor signal will increase dramatically on this wheel only. when the vehicle is raised on the hoist it will also jump up on...
2006 Chevrolet Impala LT 3.5L MIL Lamp on VIN: 2G1WT58K76
code p0172 system too rich, but if i disconect the evap solenoid that code's gone. i put new o2 sensor check fuel pressure, i did almost everything. going crazy on this one.. i'll appreciate any help. tnx amigos. Trouble codes: P0172 (system too rich)
2008 Chevrolet Cobalt LS 2.2L Steering wheel VIN: 1G1AL58F28
Hello Everyone I have this Cobalt that the steering wheel was locked and would not turn.Customer had it towed to dealer for repair.Dealer disassembled to some extent not sure how far.Customer has an after market warrenty that dealer would not accept.Then deal...
1996 GMC Sonoma SL 4.3L abs module VIN: 1GTCS14XOT
ABS light comes on when vehicle rolls above 8 mph. codes are (41 45 51 isolation solenoid circuit or solenoid) (68 locked pump motor or shorted motor circuit) when i raise the rear wheels and accelerate no ABS light or codes. although at 0 mph the scanner has ...
2001 GMC Sierra 2500 HD SLE 6.6L engine VIN: 1GTHK23171
Truck was brought to me as a basket case. the engine was already out of the truck wih the crankshaft out. Customer had the engine overhauled at a reputable machine shop. I had the fun of figuering out where all the r&r parts went. We got the engine running, an...
2008 GMC Sierra 3500 HD SLE 6.6L Brake pedal VIN: 1GTJCSS6X8
Thanks for any help! This truck lost its brake pedal about 300 miles after a 4 wheel brake job. It was returned to the dealer and the system was bled, which restored the pedal. After aprox.300 miles it lost the pedal again. The dealer replaced the master cylin...
1999 Oldsmobile Intrigue GL 3.8L horn VIN: 1G3WH52K4X
hey guys heres another good one it seems like i am getting all the problem cars lately,car comes in with the complaint that the horn would not work.check the horn and circuit to find that the horn was bad.replaced the horn,car was gone for a month.customer cal...
2006 Pontiac Grand Prix GT 3.8L Unknown VIN: 2G2WP52264
This one has me scratching my head. When you turn the ignition on the DIC displays a message SERVICE VARIABLE EFFORT STEERING after retrieving codes found that it had two codes for ABS C0110 pump mtr ckt and a c0040 RF wheel speed sensor ckt also a C0450 steer...

Fixes & Summaries for GM
Fix/Summary Answers
1992 Buick LeSabre Limited 3.8L No Start, Poor Idle Quality, Cuts out, Stall, Misfire VIN: 1G4HR53L2N
Thank you all for the great idea's. We followed your suggestions and re-flushed the whole fuel system, filled with fresh fuel, installed locking gas cap, and advisded her to not go to her local watering hole any longer. Vehicle is currently running great and...
2002 Buick LeSabre Limited 3.8L abs light VIN: 1G4HP54K12
Ok, after programing the ABS module, all lights & codes are gone. Thanks for all your help! David
2004 Buick LeSabre Custom 3.8L pwr.windows and locks VIN: 1G4HP54K14
I would like to thank all members who reached-out with assistance. Kevin [...] hit the nail on the head. With their suggestions, we hit the ground running, moved the driver's seat and pulled up the rear carpeting ...
2003 Cadillac CTS 3.2L No Start, Poor Idle Quality VIN: 1G6DM57N63
Alas I cannot verify any fix as the customer seems to have disappeared off the face of the earth!!!, repeated calls have not been answered nor have they attempted to contact me, A few of you have explained to me how it is possible for raw fuel or a butt load o...
1992 Chevrolet Lumina 3.1L No Start VIN: 2G1WL54T4N
We recieved some very good replies to this problem...Sometimes we tend to over analyze a simple problem and that is what we were doing on this one. We had checked the input signal from the ignition module to the ecm. this signal tells the ecm when to turn on t...
1992 Chevrolet S10 4.3L Timing VIN: 1GCCS1929N
I purchased a new harmonic balancer and compared timing marks in relationship to the key way, which showed that the existing ring had slipped. Although there was no feasible reason as to why it had slipped, but it did. Upon replacing the harmonic balancer, t...
1997 Chevrolet C1500 Silverado 5.7L No Start, DRAGS STARTER VIN: 1GCEC14R2V
hey guys sorry it took so long to get back.but i wanted to be sure this was the problem.i have been working on car for twenty plus years and i have never seen a intermitten problem like this.so here it is after checking the things yall suggested.the dist. cap ...
2000 Chevrolet Blazer LS 4.3L MIL Lamp on VIN: 1GNCS18W1Y
Well I believe that this one is fixed. It turns out that while performing the evap service bay test with my Tech2, it failed the test every time. I noticed that when the test failed code p0446 would show up on the screen as test failed (p0446) I already explai... Trouble codes: P0446.
2002 Chevrolet Tracker LT 2.5L 4wd VIN: 2CNBJ63492
2004 Chevrolet Trailblazer EXT LS 4.2L front differential VIN: 1GNET16S64
Thanks for all the replies everyone, greatly appreciated. Tire size difference was definately the cause. Installed reman. front diff. from Zumbrota after customer purchased 4 new tires, multiple road tests with no problems. A couple of interesting notes, Zu...
2004 GMC Sierra 3500 6.6L Poor Idle Quality VIN: 1GTHK33254
Thanks to all who responded. Many of the responses were helpful and valid for the problems we found. We found bare and shorting wires in left side harness at bracket just over left head, visible only after opening loom. #8 injector power wire intermittent o... Trouble codes: P0208, P2149.
1997 Pontiac Grand Am SE 3.1L Poor Idle Quality VIN: 1G2NE52M0V
sorry i forgot to close this.the fix was a mass air flow was all plugged up cleaned it and it helped so i just replaced it and all good.thanks for all the help on this.hope to help others when i can again thanks
2005 Pontiac Montana 3.4L high idle VIN: 1GMDV03E45
Thanks to everyone.Finally this vehicle continued to idle high.I found that the throttle angle after startup would change from 0% to 5-10%.I checked the throttle body for play ok.Ended up after many checks on feed and grds to TPS that the PCM was the fault.Rep...
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